I know the question is directed to OP, but in all honesty, every-day use body bags are nothing more than cheap plastic tarp with a zipper, and maybe sometimes a cheap nylon handle. I have encountered (more than once, sadly), moving a body in one of these amazingly made bags (please note my sarcasm), to have it rip and the contents of my deceased new friend spilling out.

This thread has me more than intrigued, but I'd like to hear some numbers.